Imperial College London

Professor Andrew H Jaffe

Faculty of Natural SciencesDepartment of Physics

Professor of Astrophysics and Cosmology



+44 (0)20 7594 7526a.jaffe Website




Miss Louise Hayward +44 (0)20 7594 7679




1018BBlackett LaboratorySouth Kensington Campus






BibTex format

author = {Suzuki, A and Arnold, K and Edwards, J and Engargiola, G and Ghribi, A and Holzapfel, W and Lee, AT and Meng, XF and Myers, MJ and O'Brient, R and Quealy, E and Rebeiz, G and Richards, P and Rosen, D and Siritanasak, P},
doi = {10.1117/12.924869},
title = {Multi-chroic dual-polarization bolometric detectors for studies of the Cosmic Microwave Background},
url = {},

RIS format (EndNote, RefMan)

AB - We are developing multi-chroic antenna-coupled TES detectors for CMBpolarimetry. Multi-chroic detectors increase the mapping speed per focal planearea and provide greater discrimination of polarized galactic foregrounds withno increase in weight or cryogenic cost. In each pixel, a silicon lens-coupleddual polarized sinuous antenna collects light over a two-octave frequency band.The antenna couples the broadband millimeter wave signal into microstriptransmission lines, and on-chip filter banks split the broadband signal intoseveral frequency bands. Separate TES bolometers detect the power in eachfrequency band and linear polarization. We will describe the design andperformance of these devices and present optical data taken with prototypepixels. Our measurements show beams with percent level ellipticity, percentlevel cross-polarization leakage, and partitioned bands using banks of 2, 3,and 7 filters. We will also describe the development of broadbandanti-reflection coatings for the high dielectric constant lens. The broadbandanti-reflection coating has approximately 100 percent bandwidth and nodetectable loss at cryogenic temperature. Finally, we will describe an upgradefor the POLARBEAR CMB experiment and installation for the LITEBird CMBsatellite experiment both of which have focal planes with kilo-pixel of thesedetectors to achieve unprecedented mapping speed.
AU - Suzuki,A
AU - Arnold,K
AU - Edwards,J
AU - Engargiola,G
AU - Ghribi,A
AU - Holzapfel,W
AU - Lee,AT
AU - Meng,XF
AU - Myers,MJ
AU - O'Brient,R
AU - Quealy,E
AU - Rebeiz,G
AU - Richards,P
AU - Rosen,D
AU - Siritanasak,P
DO - 10.1117/12.924869
TI - Multi-chroic dual-polarization bolometric detectors for studies of the Cosmic Microwave Background
UR -
UR -
ER -